The moment didn't leave "a dry eye in the house", according to Mr Leopold.

"I had some issues holding the camera because I was crying so much," he told MailOnline. "I was overwhelmed with emotion. It’s just very touching. You cannot anticipate how you’re going to feel when something like that happens. It was very heartwarming. Leo looked at my wife for the first time and saw her for the first time."

The Repponds, who live in Seattle, Washington, had sought help from Los Angeles-based pediatric ophthalmologist Kenneth Wright, the newspaper said. The special infant glasses have normal lenses but the frames, made from a rubbery material, have no screws, no hinges and no sharp edges.

"I was overwhelmed with emotion. It’s just very touching. You cannot anticipate how you’re going to feel when something like that happens"

David Reppond

"He can see us now. He’s starting to see objects in front of him for the first time," MR Reppond said. ‘He’s smiling a lot more and he can see everybody in the room, he’s interacting more.

"He loves the light and he loves being outdoors where he can see the grass and the blue sky. He loves toys and he’s starting to reach for things. "He’s seeing the world differently."

Oculocutaneous albinism, or OCA, is the most common type. Less extreme is ocular albinism, which mainly affects the eyes but not always skin and hair pigmentation. Astigmatism and nystagmus – when the eyes wobble – are also common.